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<head>
    <meta charset="UTF-8">
    <title>伪类选择器</title>
  <style>
    /*未点击过的网站的地址*/
    a:link {
      color: aqua;
    }

    a:visited {
      color: hotpink;
    }

    a:hover {
      background-color: lightblue;
    }

    a:active {
      background-color: indianred;
      font-size: 30px;
    }
  </style>
</head>
<body>
<a href="http://www.baidu.com">百度</a>
<a href="http://myhope365.com">天亮教育</a>
</body>
</html>